1. PIN FUNCTIONS
Pin Number
1
Pin Name
AGND
µPC1857A
Table 1-1. Pin Function List (1/7)
Equivalent Circuit
15
1
Description
Ground for analog signal.
Pin voltage: approx. 0.0 V
2
FC1
3
FC2
4
FC3
23
VCC
3k
3k
36 k 36 k
18 k
VCC
2
0.1 µF
VCC
3 kΩ
36 kΩ 36 kΩ
18 kΩ
VCC
3 kΩ
3
2200 pF
VCC
3k
3k
36 k 36 k
18 k
VCC
4
0.022 µF
Connection pin for capacitor which
determines time constant of phase
shifter.
Pin voltage: approx. 6.0 V
Remark Pin voltage is the reference value when VCC = 12 V.
7